<!DOCTYPE html>
<html>
  <head>
    <title>{{= title }}</title>
    <link rel='stylesheet' href='/stylesheets/style.css' />
  </head>
  <body>
    <h1>{{= title }}</h1>
    <!-- locals.helloWorld 来自res.locals.*中的定义 -->
    <p>Welcome to {{= locals.helloWorld }}</p>
  </body>
</html>
